Hallow an alternate spelling for 'hallo'

[Kemper]

No: HPFGUIDX 163083

Dictionary.com lists 'hallo' pronounced huh-loh to mean
noun
3. a shout of exultation
verb used without object
4. to call with a loud voice; shout; cry, as after hunting dogs
verb used with object
5. to incite or chase (something) with shouts and cries of 'hallo!'
7. to shout (something)

Does someone have an OED?  I suppose I could go to the Idaho Falls
Library... but I doubt they'd have one...

If Harry was more urban perhaps the titled would be 'the Deathly Holla Back!"

Kemper, who learned about the title via text message in the bowels of
southern Idaho